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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. ~60 days before calving






2. Luteolysis happens because of the ____________ hormone






3. 147 days






4. Front feet and head first. (except for hogs and dogs)






5. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






6. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






7. What helps regulate spermatogenesis?






8. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






9. Days which have increasing daylight hours

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10. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






11. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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12. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






13. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






14. Look for infection - split - and rupture of the penis






15. When are steers and heifers weaned from bottle feeding?






16. Milk is 15% ________ and 85% __________.






17. Animal which has been castrated after puberty






18. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






19. 2 month growth cycle. stored in the epididymis of the bull






20. Milk is 15% ________ and 85% __________.






21. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






22. Failure to have both testis (gonads) descend






23. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






24. Days which have increasing daylight hours

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25. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






26. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






27. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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28. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






29. Birthing process (termination of gestation)






30. ~60 days before calving






31. What makes the milk flow through the mammary glands?






32. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






33. Animal which has been castrated after puberty






34. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






35. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






36. (male) pushes the testes outward toward the legs for a cool-down off of the body






37. 1-3 days






38. Duct through penis that carries sperm and urine






39. 26 hours after estrus begins






40. 30-38 hours after estrus cycle begins






41. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






42. 26 hours after estrus begins






43. Why does estrus happen before ovulation?






44. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






45. Allows extension of penis without fibro-elastic penis






46. 19-23 (21) days






47. (switzerland) 2nd in size and milk production - most muscle -






48. What about the sperm for a bull which has been castrated but still has testicles?






49. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






50. Can survive ~7 days in cow. vast majority <48 hours